Ivar error with Fit inside Plot

Question

I'm trying to plot this Plot[Fit[med,{1,x},x],{x,0,10}] Why this doesn't work? I find out that if I do Plot[Evaluate@Fit[med,{1,x},x],{x,0,10}] works fine. But can somebody explain me why this happens in first place?

score 4 · Accepted Answer · answered Aug 23 '14 at 13:37

4

Plot has attribute HoldAll, therefore the expression Fit is hold in an unevaluated form.

Using

Attributes@Plot

(* out *)
{HoldAll, Protected}

reveals the attributes

answered Aug 23 '14 at 13:37

hieron

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6
13

Thanks, and why this is useful? I mean, the holdall – Kafkarudo Aug 23 '14 at 13:46
Sometimes we don't want the argument to be evaluated at once, please have a look at the examples given by documentation center – hieron Aug 23 '14 at 13:50

Ivar error with Fit inside Plot

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